Induced Red Circularly Polarized Luminescence Emission Promoted by Intermolecular Förster Resonance Energy Transfer through a Cholesteric Liquid Crystal Medium.
Induced Red Circularly Polarized Luminescence Emission Promoted by Intermolecular Förster Resonance Energy Transfer through a Cholesteric Liquid Crystal Medium.
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DOI：
10.1021/acsami.3c04214
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发表时间：
2023-05
影响因子：
9.5
通讯作者：
Dan-tong Xu;Xinran Hua;Chao Liu;Jiaxin Luo;Wenhua Zheng;Yixiang Cheng
中科院分区：
文献类型：
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作者：
Dan-tong Xu;Xinran Hua;Chao Liu;Jiaxin Luo;Wenhua Zheng;Yixiang Cheng
本文以[2.2]对环芳烷PCPH 5为手性诱导剂和能量供体，在商品化的手性液晶（SLC 1717，N-LC）介质中构建了具有圆偏振发光（CPL）活性的三元手性液晶（T-N*-LC）。基于非手性聚合物DTBTF 8的能量受体的诱导红色CPL发射可以通过分子间Förster共振能量转移机制成功地促进。所得的T-N*-LCs可以产生强度高达+0.70/-0.67的CPL信号。有趣的是，T-N*-LC的这种“开-关”CPL切换可以通过所施加的直流电场来操纵。
In this paper, planar chiral helicenes based on [2.2]paracyclophane PCPH5 acted as both chiral inducers and energy donors to construct the circularly polarized luminescence (CPL)-active ternary cholesteric liquid crystals (T-N*-LCs) in a commercial nematic liquid crystal (SLC1717, N-LCs) medium. Induced red CPL emission based on the energy acceptor of the achiral polymer DTBTF8 could be successfully promoted by the intermolecular Förster resonance energy transfer mechanism. The resulting T-N*-LCs can generate intensive CPL signals with glum up to +0.70/-0.67. Interestingly, this kind of "on-off" CPL switching of T-N*-LCs can be manipulated by the applied direct current electric field.